Furnace grate



my 117, w23- 1462.393 R. E. STURMAN l 4FURNAC E GRATE Original FiledJuly 18 1917 Patented duly 17, 1923.

TEN ,iii F l',

ROBERT E. sTUnMiiN, or DELANO, MINNESOTA. y

FURNACE GRATE.

Original applica/tion led July 18, 1917, Serial No. 175,384. Divided andthis application led January To a-ZZ whom t may concern.'

Be it known that Is ROBERT E. STURMAN, a citizen of the United States,residing at Delano, in the. county of Wright and State of Minnesota,have invented a new and useful Improvement in Furnace Grates, ofwhichthe following is a specification.

My invention relates to a furnace grate, .thepriinary object of which isto provide a grate that can be easily operated, being of simpleconstruction and having a somewhat conical shape to distribute the fireor fuel in the furnace, or spread it out pyramidally in the furnace inwhich the grate is placed. This application is a division of myapplication filed June 18, 1917 bearing Serial No. 175,384. n

It is also an Object to provide a grate with a series of individualgrate bars, which are pivoted at their ends, the inner ends of all ofthe `grate bars being provided with means which connects the segmentswith operating means so that all of the grate bars of the grate can berocked simultaneously on their pivot points to shake the grate, or fordumping the same. The grate operating means is of such construction thatit can be operated by a lever outside of the 'furnace in the ordinarymanner. v

A further object of my invention is to provide `a grate which is soconstructed that the grate bars canbe easily removed to be replaced whenworn out or for repairs, and of a suitable shape to suit the occasion.

In the drawing forming part of the specication:

Figure 1 is a plan view of my grate.`

Figure 2 is a-section on the line 2--2 of Figure 1.

Figures 3 and 4 are detailed portions of the grate construction.

In the drawing A represents my furnace grate which is circular in shape,having1 a series of triangular shaped grate bars 1 which are formed withlugs 2 on their inner ends, and lugs 3 on their outer ends. The

rate bears 1 are pivotally held or supported y the lugs 2 and 3 on thegrate supporting means, the lugs 2 engaging in the semi-circularrecesses 4 of the spider 5, and the lugs 3 engaging in the semi-circularrecesses 6 which are formed in the supporting ring 7. The supportingring- 7 is held in the ordinary manner above the ash pit of the furnaceand the supporting arms 8 of the spider 5 Serial No. 273,910.

are adapted to engage the ring 7 tolhold the spider 5 in place. The arms8 project up-v wardly from their point of engagement with the ring 7 soas to elevate the central or body portion 9 of the spider above thesupporting ring 7. The recesses 4 are formed in the body portion 9, sothat when the grate bars 1 are in position with the lugs 2 engaging inthe recesses 4, and the lugs 3 engaging in the recesses 6, the gratebars 1 will be held in a sloping position7 with their inner endselevated above their Outer extremities, thusl giving a conical shape tothe grate A.

The grate bars 1 are formed with suitable supporting fingers 10 whichare spaced apart to give the desired draft openings to the grate A, thesupporting fingers 10 decreasing in length from the outer to the innerends of the grate bars, the fingers projecting from the body orlongitudinally ex-y tending body portion 11 of the grate bars.

Each of the grate bars 1 has a gear tooth 12 formed with and projectingfrom the lug 2 which is adapted to engage or mesh with the teeth 13 ofthemushrooin gear 14, and a depending shaft 15 which is rigidlyconnected to the gear 14 extends through the axial opening 16 in thespider 5 and is rigidly connected on its lower end to the operatinglever end of the lever 17 is pivotally connected to the operating orreach rod 18 at 19. Thel outer end 2O of the reach rod 18 is connected,in a suitable manner, to the shaker arm or lever which is positionedoutside of the furnace, the shaker arm being of ordinary wellknownconstruction, and not being illus trated in the drawing.

In operation of the grate A, when the reach rod 18 is operated orreciprocated back and forth by the shaker arm, the gear 14 will beturned, thus causing the grate bars 1 to turn on their pivotal lugs 2and 3 to oscil- 17. The n free late all of the grate barssimultaneously, or f to rotate them far enough to dump the ashes or firefrom the grate when it is desired. In this manner the grate A is easilyand effectively operated, and the conical or pyramidal shape of thegrate causes the fire or fuel on the grate to assume the same shape, andthus has a tendency to evenly distribute the fuel or fire on the grate AtO give the best results.

The drawing illustrates the grate A of a circular shape, but it isobvious that other shapes and forms can be used without departingfromthespirit: of my invention, and

the seriesef` grate bars can bevaried in number and shape as may bedesired. In the construction illustrated, the grate bars l can be easilyremoved andy nevv grate'bars inserted. The even operation oroscillatiouo all of the grate bars simultaneously 'is an i1n`port-ant,eature,..andallowsv the fire on the` grate A to be effectivelyyshaken in aivery` easy manner.

In? accordance .,With'thei patent statutes, :I have idesci'ibed/ theprinciples oiy toperation of my invention, together with the apparatuslwhich I inowconsider to `represent theibest- 'embodiment-thereof, butwIdesire lto have :it

understood that theconstruction shown is only illustrative, and that'the-invention can be carriedou-t by other means and applied to usesother-'than those above set forth 'Witlr in thef scope Aoftheif'lfollowing claims.

l. -A` rocking bar grate comprisinga plurality of tapered grate barsprovided attheir ends Withft runnions,-ixed means for sup-v portingVsaid grate lbars in radialf arrangement, upstanding lugs formed on theinner most trunnionsof said grate bars and an oscillatory headjournalled insaid support-H ing `means having means adapted to eng-agesaid lupstanding lugs'to rock the grate bars. 2. Arocking gratecomprising a fixed `annular support, a hub coaxiallyf: arranged relativethereto :and connected therewith, a pluralityl of'socketsformed in saidannular support, corresponding sockets formed in -said^hub,`l a`plurality 'of grate #bars having trunnions journalle'd `.in saidsockets, protru sions formed' on said hub-trunnions, an oscil' `latoryhead mounted in said hub, means formed on said head simultaneouslycoacting *with 4'saidf protrusions for y'simultaneously rocking saidgrate barsand means or `oscil latin@ said head."A 3.' nI-a devicepointsie fof thef class described, ar series of triangularly shapedgrate bars, ar-

rangedin radial relatiomime-ans forpivot 45 illyi holding said gratebars on theirinner and outer ends for oscillation about theirlongitudinal vaxes,atoo.th formed on the inner end of each of said gratebars, a gear positionedabove said grate bar teeth, adapted to engagesaid teeth and means for operatingk said gear to oscillate said .grate;bar s-. on theiripivot points.

4. In a furnace grate comprising a series `oi radiallyarranged.-grate-bars,m-eans for\55 holding said grate rbars .pivoted`ateach enel,Y an upwardly iextending gear tooth, .formedy grate bars, amushroom gearffon/engaging v said i gear. teeth, an :operatingdeverconnecw $.60

ed to said mushroom'.gearhiandmeans!consu. neet-ed lto said operating..lever which, when reciprocatedbaok `and orthis adapted; tom` movesaidfniushroom gearto.simultan'eouslyg;I j y ing in i length from therouter endsi of f said grate bars toward. the innerends` thereof, Y- gearteeth `formed. on said segmentsfat theiry A'80 inner ends, a i gear,axial-lyheld in said-spider; .i or engaging. ysaid teeth and; meansfonoper-x :I ating said gear to oscillate saidgrate'bars= on their pivotpointsito shakesaid gratebarsr or to'idump .ther same: substantially,gasi y're-.3,85 quired, z

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